﻿using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WinformTest
{
    class DbHelper
    {
        private static readonly string conString = "server=.;database=Blogs;uid=sa;pwd=123456";

        public static DataTable GetDataTable(string sql)
        {
            SqlConnection sqlConnection = new SqlConnection(conString);

            SqlDataAdapter dataAdapter = new SqlDataAdapter(sql, sqlConnection);

            DataTable dt = new DataTable();
            sqlConnection.Open();

            dataAdapter.Fill(dt);

            return dt;
        }

        //新增或修改的方法
        public static int AddOrEditOrDeleteSave(string sql)
        {
            SqlConnection sqlConnection = new SqlConnection(conString);

            SqlCommand command = new SqlCommand(sql, sqlConnection);

            sqlConnection.Open();

            return command.ExecuteNonQuery();
        }
    }
}
